let's go to bob ward. bob. >> you've been watching live coverage here and continuing coverage of the dramatic developments going on in watertown massachusetts. what we understand here is that suspect number two has been cornered in the backyard of a home on franklin lane there in watertown massachusetts. apparently he has been hiding out inside a boat that is in the backyard. the woman who owned the house said she noticed that something was a little odd. she saw some bloody clothes and blood on the ground. she called authorities. that led them to this scene. they have since pulled back. they believe that the suspect is alive but is probably wounded. authorities have pulled back. they have sent in a robot to examine the situation. there was obviously a lot of concern that this suspect may have some explosives with him. we have heard a number of what could be explosions they could also be those flash bang grenades going off that authorities will use to stun a person so they can then ve in and apprehend him.